A busy engineer always needs his tools close at hand and while a Gladstone bag and the pockets of one’s waistcoat are useful enough, a chap cannot beat Mr Montague’s Marvellous Magnetic Hatband for extra storage space.

A sturdy leather strap that you can slip your dividers and protractors into with strong magnetic rivets for the attachment of smaller gauges and marking tools too.

An indispensable aid to the building of modern marvels by the greatest of engineers.